Not possible to select text from parts of the TUI

### Describe the bug

Recent changes made the tool to behave like a GUI, not a TUI.

### Affected version

GitHub Copilot CLI 1.0.72-0.

### Steps to reproduce the behavior

Repro Steps:
Call /skills, try to select any text from the interface

Observed Results:
You can't select any text for copy

### Expected behavior

Anything on the terminal needs to be selectable for a copy operation, otherwise you can't call yourself a terminal application.

### Additional context

_No response_

Start by reproducing the issue with GitHub Copilot CLI 1.0.72-0: run /skills and try selecting text in the TUI. Trace the terminal interaction handling to determine why text cannot be selected; done means text from the interface can be selected and copied in the terminal.

Written by the indexing model from the issue text.